what is the value x, when x=0

Dar student, 
there are two possibilities for this
Zero to the power of zero, denoted by 00, is a mathematical expression with no agreed-upon value. The most common possibilities are 1 or leaving the expression undefined, depending on context. In algebra, combinatorics, or set theory, the generally agreed upon value is 00= 1, whereas in mathematical analysis, the expression is generally left undefined.

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